[meld] build_helpers: Add a copyright header

[Kai Willadsen <kaiw src gnome org>]

commit 90ee363ea99dcac4ded3d4a82f141fe75ce6d955
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Thu Nov 7 06:19:44 2013 +1000

    build_helpers: Add a copyright header
    
    The original source doesn't actually use copyright headers anywhere;
    the header here is based on the LICENSE file and the Debian metadata.
    Authors list is guessed. The Canonical copyright appears on several
    related files, but without any current dates.

 meld/build_helpers.py |   24 ++++++++++++++++++++++--
 1 files changed, 22 insertions(+), 2 deletions(-)
---
diff --git a/meld/build_helpers.py b/meld/build_helpers.py
index a40e7cc..3e4fdf7 100644
--- a/meld/build_helpers.py
+++ b/meld/build_helpers.py
@@ -1,5 +1,25 @@
-# Created by Sebastian Heinlein
-# Modified by Kai Willadsen
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
+# USA.
+
+# Copied and adapted from the DistUtilsExtra project
+# Created by Sebastian Heinlein and Martin Pitt
+# Copyright Canonical Ltd.
+
+# Modified by Kai Willadsen for the Meld project
+# Copyright (C) 2013 Kai Willadsen <kai willadsen gmail com>
+
 
 import distutils.cmd
 import distutils.command.build